https://wiki.freitagsrunde.org/index.php?action=history&feed=atom&title=C-Kurs%2Flibgdsl-beispiel 2026-05-11T12:09:26Z Versionsgeschichte dieser Seite in FreitagsrundenWiki MediaWiki 1.31.16 https://wiki.freitagsrunde.org/index.php?title=C-Kurs/libgdsl-beispiel&diff=20529&oldid=prev 2013-03-05T17:37:18Z

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PaulG https://wiki.freitagsrunde.org/index.php?title=C-Kurs/libgdsl-beispiel&diff=12598&oldid=prev 2009-09-25T02:41:10Z

<p>Die Seite wurde neu angelegt: „&lt;pre&gt; #include &lt;stdio.h&gt; #include &lt;stdlib.h&gt; #include &lt;string.h&gt; #include &lt;gdsl_types.h&gt; #include &lt;gdsl_stack.h&gt; /** Copies the given data element (a string in...“</p> <p><b>Neue Seite</b></p><div>&lt;pre&gt;<br /> #include &lt;stdio.h&gt;<br /> #include &lt;stdlib.h&gt;<br /> #include &lt;string.h&gt;<br /> <br /> #include &lt;gdsl_types.h&gt;<br /> #include &lt;gdsl_stack.h&gt;<br /> <br /> <br /> /** Copies the given data element (a string in our case) */<br /> gdsl_element_t alloc_element(void *elem) {<br /> int len = strlen((char *)elem);<br /> gdsl_element_t result = malloc(len + 1);<br /> memcpy(result, elem, len + 1);<br /> return result;<br /> }<br /> <br /> /** Frees memory consumed by the given element */<br /> void free_element(gdsl_element_t e) {<br /> free(e);<br /> }<br /> <br /> /** Prints the given element to an arbitrary stream */<br /> void print_element(gdsl_element_t element, FILE *file,<br /> gdsl_location_t location, void *user_data) {<br /> fprintf(file, &quot;%i: %s\n&quot;, location, (char*)element);<br /> }<br /> <br /> /** Call-back function for traversal of data structure */<br /> int do_something(gdsl_element_t element,<br /> gdsl_location_t location,<br /> void *user_data) {<br /> printf(&quot;%s&quot;, (char*)element); /* just print the element */<br /> return GDSL_MAP_CONT; /* continue traversal */<br /> }<br /> <br /> #define BUFFER_SIZE 1000<br /> <br /> int main(int argc, char **argv) {<br /> <br /> /* Initialize the stack structure with pointers to alloc-<br /> * and free functions */<br /> gdsl_stack_t stack = gdsl_stack_alloc(&quot;Mein Stack&quot;,<br /> alloc_element,<br /> free_element);<br /> <br /> /* Fill the stack dynamically */<br /> char buffer[BUFFER_SIZE];<br /> printf(&quot;&gt; &quot;);<br /> fgets(buffer, sizeof(buffer)-1, stdin);<br /> while (strlen(buffer) &gt; 1) {<br /> gdsl_stack_insert(stack, buffer);<br /> printf(&quot;&gt; &quot;);<br /> fgets(buffer, sizeof(buffer)-1, stdin);<br /> }<br /> <br /> /* Traverse stack forward */<br /> printf(&quot;map_forward\n-----------\n&quot;);<br /> gdsl_stack_map_forward(stack, do_something, NULL);<br /> <br /> /* Traverse stack backward */<br /> printf(&quot;map_backward\n------------\n&quot;);<br /> gdsl_stack_map_backward(stack, do_something, NULL);<br /> <br /> /* printf(&quot;\nDump: &quot;);<br /> gdsl_stack_write_xml(stack, print_element, stdout, NULL); */<br /> <br /> <br /> /* Traverse and free stack manually */<br /> while (!gdsl_stack_is_empty(stack)) {<br /> gdsl_element_t e = gdsl_stack_remove(stack);<br /> free_element(e);<br /> }<br /> <br /> /* Free complete data structure and its contents */<br /> gdsl_stack_free(stack);<br /> <br /> return EXIT_SUCCESS;<br /> <br /> }<br /> &lt;/pre&gt;</div>

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